With Intelligent Key System

U1000 CAN COMM CIRCUIT

BCM : Description

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to "CAN Communication Signal Chart" CAN Communication Signal Chart.


BCM : DTC Logic


DTC DETECTION LOGIC








BCM : Diagnosis Procedure


1. PERFORM SELF DIAGNOSTIC

1.Turn the ignition switch ON and wait for 2 seconds or more.
2.Check "Self Diagnostic Result" of BCM.
Is DTC "U1000" displayed?
YES- Refer to "Trouble Diagnosis Flow Chart" Trouble Diagnosis Flow Chart.
NO- Refer to "Intermittent Incident" Intermittent Incident.


INTELLIGENT KEY UNIT : Description

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detectability. Modern vehicles are equipped with many electronic control units, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to "CAN Communication Signal Chart" CAN Communication Signal Chart.


INTELLIGENT KEY UNIT : DTC Logic


DTC DETECTION LOGIC








INTELLIGENT KEY UNIT : Diagnosis Procedure


1. PERFORM SELF DIAGNOSTIC

1.Turn ignition switch ON and wait for 3 seconds or more.
2.Check "Self Diagnostic Result".
Is "CAN COMM CIRCUIT" displayed?
YES- Refer to "Trouble Diagnosis Flow Chart" Trouble Diagnosis Flow Chart.
NO- Refer to "Intermittent Incident" Intermittent Incident.